nbc's keir simmons joins us. what do we knee about the circumstances of this and what could have led to this? >> well, look jacintha saldanha was well respected and liked the hospital said. she had been at the hospital around four years. we think she was the nurse who took a call from an australian radio station, a prank call, where the radio hosts were pretending to be the queen and prince charles and got put through to the ward where kate middleton was. now the radio station has just issued a statement, andrea, saying that their deepest sympathies go to jacintha's family and it says chief executive officer has spoken with the host and presenters and they are both deeply shocked and at this time have agreed not to comment on the circumstances. it says the hosts have died they will not return to their radio show until further notice for respect of what can only be described as a tragedy. it does have people very upset around the world, in particular, though, of course, kate and william and they have issued a stat